Mersana Therapeutics, Inc.
MRSNDelisted Jan 6, 2026- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001442836
Mersana Therapeutics, Inc. was delisted on Jan 6, 2026; its insiders filed their last Form 4 on Jan 6, 2026; 51 institutions reported holding it in 13F filings for Q4 2025, worth $64.8M in total; no superinvestor held it.
13F holders, Q2 2022
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 2022. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 126
- 0 vs. Q1 2022
- Shares held
- 88.3M
- +7.48M (+9.2%) vs. Q1 2022
- Total value
- $408.0M
- +$85.4M (+26.5%) vs. Q1 2022
- New holders
- 19
- 50 more added
- Sold out
- 19
- 36 more reduced
2 institutions that held it in Q1 2022 haven't filed for Q2 2022 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2022: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MRSN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 0 | $0 |
| Q1 2026 | 1 | $87 |
| Q4 2025 | 51 | $64.8M |
| Q3 2025 | 49 | $24.7M |
| Q2 2025 | 85 | $22.9M |
| Q1 2025 | 111 | $30.2M |
| Q4 2024 | 132 | $149.2M |
| Q3 2024 | 116 | $219.4M |
| Q2 2024 | 122 | $229.6M |
| Q1 2024 | 125 | $526.3M |
| Q4 2023 | 106 | $263.0M |
| Q3 2023 | 128 | $144.4M |
| Q2 2023 | 147 | $370.2M |
| Q1 2023 | 158 | $437.2M |
| Q4 2022 | 152 | $592.8M |
| Q3 2022 | 152 | $623.4M |
| Q2 2022 | 126 | $408.0M |
| Q1 2022 | 128 | $322.7M |
| Q4 2021 | 122 | $436.6M |
| Q3 2021 | 110 | $648.3M |
| Q2 2021 | 131 | $957.8M |
| Q1 2021 | 132 | $1.14B |
Institutions, Q2 2022
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Capital Advisors, Ltd. LLC | 71 | $0 | 0.00% | +71 | New |
| Ellevest, Inc. | 57 | $0 | 0.00% | +57 | New |
| Parallel Advisors, LLC | 78 | $0 | 0.00% | +78 | New |
| North Star Investment Management Corp. | 150 | $1.00K | 0.00% | 00.0% | Unchanged |
| Daiwa Securities Group Inc. | 246 | $1.00K | 0.00% | 00.0% | Unchanged |
| Captrust Financial Advisors | 226 | $1.00K | 0.00% | −37−14.1% | Reduced |
| Dark Forest Capital Management LP | 311 | $1.00K | 0.00% | +311 | New |
| Royal Bank of Canada | 494 | $2.00K | 0.00% | −3,903−88.8% | Reduced |
| Nisa Investment Advisors, LLC | 610 | $3.00K | 0.00% | −48,100−98.7% | Reduced |
| Quantbot Technologies LP | 954 | $4.00K | 0.00% | −8,400−89.8% | Reduced |
| Wells Fargo & Company | 1,138 | $5.00K | 0.00% | −16,596−93.6% | Reduced |
| Cutler Group LP | 1,200 | $5.00K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 2,023 | $9.00K | 0.00% | −16,100−88.8% | Reduced |
| STRS Ohio | 2,500 | $11.0K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 3,235 | $15.0K | 0.00% | +118+3.8% | Added |
| PEAK6 Investments LLC | 5,000 | $16.4K | 0.00% | +5,000 | New |
| Great West Life Assurance Co | 3,638 | $17.0K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 4,484 | $20.0K | 0.00% | −51,974−92.1% | Reduced |
| Metropolitan Life Insurance Co | 4,758 | $22.0K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 5,400 | $24.0K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 7,262 | $34.0K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 8,492 | $39.0K | 0.00% | +67+0.8% | Added |
| UBS Group AG | 8,829 | $41.0K | 0.00% | −6,295−41.6% | Reduced |
| Ensign Peak Advisors, Inc | 9,040 | $42.0K | 0.00% | 00.0% | Unchanged |
| Washington University | 9,367 | $43.0K | 0.02% | +9,367 | New |
| Citigroup Inc | 9,599 | $44.0K | 0.00% | +3,241+51.0% | Added |
| Empirical Asset Management, LLC | 10,000 | $46.0K | 0.05% | 00.0% | Unchanged |
| Walleye Capital LLC | 10,264 | $47.0K | 0.00% | −383,986−97.4% | Reduced |
| AXA S.A. | 10,800 | $49.9K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 11,135 | $51.0K | 0.00% | +345+3.2% | Added |
| Janus Henderson Group PLC | 11,343 | $53.0K | 0.00% | +145+1.3% | Added |
| Martingale Asset Management L P | 12,110 | $56.0K | 0.00% | +65+0.5% | Added |
| Victory Capital Management Inc | 12,537 | $58.0K | 0.00% | +2,275+22.2% | Added |
| Principal Financial Group Inc | 13,938 | $64.0K | 0.00% | +2,769+24.8% | Added |
| Simplex Trading, LLC | 14,683 | $67.0K | 0.00% | −2,497−14.5% | Reduced |
| Grimes & Company, Inc. | 14,922 | $69.0K | 0.00% | +553+3.8% | Added |
| ProShare Advisors LLC | 17,399 | $80.0K | 0.00% | −4,649−21.1% | Reduced |
| SEI Investments Co | 17,256 | $80.0K | 0.00% | +17,256 | New |
| HSBC Holdings PLC | 18,737 | $85.0K | 0.00% | +18,737 | New |
| Bank of Montreal | 16,737 | $86.0K | 0.00% | −1,140,898−98.6% | Reduced |
| Susquehanna International Group, LLP | 19,093 | $88.0K | 0.00% | −154,693−89.0% | Reduced |
| Occudo Quantitative Strategies LP | 19,056 | $88.0K | 0.01% | −119,160−86.2% | Reduced |
| Arizona State Retirement System | 20,481 | $95.0K | 0.00% | +4,930+31.7% | Added |
| Dynamic Technology Lab Private Ltd | 20,836 | $96.0K | 0.01% | +3,809+22.4% | Added |
| Mirae Asset Global Investments Co., Ltd. | 22,616 | $104.0K | 0.00% | +22,616 | New |
| Qube Research & Technologies Ltd | 23,126 | $107.0K | 0.00% | −276,328−92.3% | Reduced |
| Jasper Ridge Partners, L.P. | 23,100 | $107.0K | 0.01% | 00.0% | Unchanged |
| AQR Capital Management LLC | 23,400 | $108.0K | 0.00% | +10,688+84.1% | Added |
| Prio Wealth Limited Partnership | 23,529 | $108.7K | 0.00% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 25,529 | $118.0K | 0.00% | −251,560−90.8% | Reduced |
| State Board of Administration of Florida Retirement System | 27,292 | $126.0K | 0.00% | +100.0% | Added |
| Invesco Ltd. | 29,190 | $135.0K | 0.00% | −878−2.9% | Reduced |
| Legal & General Group Plc | 31,546 | $145.0K | 0.00% | +6,251+24.7% | Added |
| Voya Investment Management LLC | 33,172 | $153.0K | 0.00% | +6,846+26.0% | Added |
| Barclays PLC | 34,087 | $157.0K | 0.00% | −7,487−18.0% | Reduced |
| Virtus ETF Advisers LLC | 34,799 | $161.0K | 0.06% | +6,505+23.0% | Added |
| Manufacturers Life Insurance Company, The | 36,339 | $167.9K | 0.00% | +4,979+15.9% | Added |
| Partners Group Holding AG | 37,473 | $173.0K | 0.01% | +37,473 | New |
| MetLife Investment Management | 38,495 | $177.8K | 0.00% | +13,522+54.1% | Added |
| XTX Topco Ltd | 38,724 | $179.0K | 0.07% | +28,638+283.9% | Added |
| Prudential Financial Inc | 39,695 | $183.0K | 0.00% | +39,695 | New |
| Cornercap Investment Counsel Inc | 40,477 | $187.0K | 0.03% | +40,477 | New |
| American International Group, Inc. | 41,017 | $189.0K | 0.00% | +5,484+15.4% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 42,300 | $195.0K | 0.00% | −336,700−88.8% | Reduced |
| SG Americas Securities, LLC | 47,555 | $220.0K | 0.00% | +47,555 | New |
| Caxton Associates LP | 47,915 | $221.0K | 0.03% | +47,915 | New |
| New York State Common Retirement Fund | 48,705 | $225.0K | 0.00% | −118−0.2% | Reduced |
| Balyasny Asset Management LLC | 55,249 | $255.0K | 0.00% | +26,724+93.7% | Added |
| Bank of America Corp | 56,777 | $262.0K | 0.00% | +22,272+64.5% | Added |
| QVT Financial LP | 62,657 | $289.0K | 0.02% | 00.0% | Unchanged |
| Credit Suisse AG | 80,542 | $373.0K | 0.00% | +4,585+6.0% | Added |
| Kennedy Capital Management, Inc. | 88,402 | $408.0K | 0.01% | +88,402 | New |
| UBS Asset Management Americas Inc | 88,374 | $408.3K | 0.00% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 89,900 | $415.0K | 0.00% | +12,600+16.3% | Added |
| California State Teachers Retirement System | 101,735 | $470.0K | 0.00% | +21,386+26.6% | Added |
| Cubist Systematic Strategies, LLC | 119,516 | $552.0K | 0.00% | −166,478−58.2% | Reduced |
| FMR LLC | 123,379 | $570.0K | 0.00% | −3,324−2.6% | Reduced |
| Rhumbline Advisers | 135,544 | $626.0K | 0.00% | +55,659+69.7% | Added |
| Price T Rowe Associates Inc | 139,819 | $646.0K | 0.00% | +1,785+1.3% | Added |
| Macquarie Group Ltd | 154,418 | $713.0K | 0.00% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 168,744 | $780.0K | 0.12% | +90,038+114.4% | Added |
| Swiss National Bank | 177,996 | $822.0K | 0.00% | +42,000+30.9% | Added |
| Graham Capital Management, L.P. | 203,067 | $938.0K | 0.04% | +203,067 | New |
| Dimensional Fund Advisors LP | 209,060 | $965.0K | 0.00% | +23,020+12.4% | Added |
| Squarepoint Ops LLC | 226,372 | $1.05M | 0.01% | −262,625−53.7% | Reduced |
| Allianz Asset Management GmbH | 235,225 | $1.09M | 0.00% | +26,705+12.8% | Added |
| State of Wisconsin Investment Board | 240,729 | $1.11M | 0.00% | +45,429+23.3% | Added |
| PDT Partners, LLC | 241,899 | $1.12M | 0.10% | −84,520−25.9% | Reduced |
| EcoR1 Capital, LLC | 310,960 | $1.44M | 0.05% | −15,618−4.8% | Reduced |
| Bank of New York Mellon Corp | 343,712 | $1.59M | 0.00% | +60,617+21.4% | Added |
| Citadel Advisors LLC | 351,415 | $1.62M | 0.00% | −335,274−48.8% | Reduced |
| Hudson Bay Capital Management LP | 400,000 | $1.85M | 0.02% | −35,000−8.0% | Reduced |
| DAFNA Capital Management LLC | 406,763 | $1.88M | 0.51% | +54,000+15.3% | Added |
| Nuveen Asset Management, LLC | 441,834 | $2.04M | 0.00% | +142,384+47.5% | Added |
| Fred Alger Management, LLC | 449,661 | $2.08M | 0.01% | +126,593+39.2% | Added |
| Two Sigma Investments, LP | 451,174 | $2.08M | 0.01% | −824,460−64.6% | Reduced |
| JPMorgan Chase & Co | 451,139 | $2.08M | 0.00% | +141,510+45.7% | Added |
| Wellington Management Group LLP | 480,644 | $2.22M | 0.00% | 00.0% | Unchanged |
| UBS Oconnor LLC | 491,048 | $2.27M | 0.02% | +491,048 | New |
| Platinum Investment Management Ltd | 495,481 | $2.29M | 0.09% | 00.0% | Unchanged |